Improvement in boiler-flue scrapers



dimmi Geistes 13a-tent diibiir.

Letters Patent No. 92,7 90,' dated July 20, 1869.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom 'lt may concern:

Be it known that I, LESTER B. BROWN, of Petroleum Centre, in the countyof Veuango, and State of Pennsylvania, have invented a certain new anduseful Improvement in Elue-Cleaners for Tubular Steam-Boilcrs,and forother purposes; and the'following is a full, clear, and exactdescription ofthe same, reference being had to the accompanyingdrawings, making a part of this specification, in whichl Figure lrepresents a broken-ofi` section. of a tube or liuc, with the scraperscontracted, so as to easily enter the hollow opening through the tube orflue.

Figure 2 shows a view of the same with the rod drawn, the Scrapersexpanded to fill the diameter of the ilue.

Figure shows three sectional end views of the spring-Scrapers andcone-slide for operating the scrapers.

The object of my invention is to furnish a: chea durable, and eficientimplement, to scrape the soot and ashes, and more thoroughly clean outythe fire-fines of tubular steam-generators orhorizontal stove-pipes,85o.

My invention consists inthe construction, arrange-l ment, andcombination of yielding spring-Scrapers With a cone-slide,adjusting-rod, and tube-handle, to be operated in the manner hereinaftermore fully described.

I' take a piece of small gas-pipe or tubing, A, of the desired length,to which I secure, at one end, two or more metal Scrapers, B. B, of sucha length as to allow' themto yield readily, so as -to expand oroontract'according to the size or diameter of the inside of the tube CC, or ilucs of a tubular steam-boiler, or smoke-pipes of furnaces, whichare so liable to become clogged up with soot and ashes.

The scraper-s B B are formed of light sheet-metal, in a semicircle orcurve, the end being turned out at a right angle, so'as to bring thethin, sharp edges b b in contact with the tube or flue C whensufficiently expanded. i l

This is effected by means of acone, D, secured to a rod, (l, ywhichpasses through the pipe or tubing A,

the rod ld being provided with a handle-knob, a, or d ring, by which thecone I) is slid in the Scrapers B B, 1

their form being such, that by drawing the 'cone forward the Scrapersare forced outward at the end, and

the sharp edges b b are brought iu contact with .the`

two sides of the vflue G, and may be made to bear sufliciently hard toremove all of the soot that has adhered to the inner surface by a singlethrust or withdrawal of the Scrapers. Then, by contracting the. ScrapersB B, and inserting again, and bringing the edges b b to bear on thequarter, the iiue will be cleaned in the most thorough manner.

The advantages of my invention are well knownand appreciated in theoil-regions, where there are so many tubular steam-boilers in use; andit has been practically demonstrated th'at there is at least onehundred` in the presence of LESTER B. BROWN. Witnesses:

J. G. ELLIOTT, JAS. H. SMITH.

